monkey wrench

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monkey wrench

a wrench with adjustable jaws
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

monkey wrench

[′məŋ·kē ‚rench]
(design engineering)
A wrench having one jaw fixed and the other adjustable, both of which are perpendicular to a straight handle.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

monkey wrench

monkey wrench
A wrench having one jaw fixed and the other jaw (which is adjusted by a screw) movable.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
These critics view appeals as little more than monkey wrenches thrown at the Forest Service to halt all logging.
Disparate accessories such as bungee cords and monkey wrenches are often found dumped here and there among small piles of empty beer cans.
But adding lithium to the system, say by taking a pill of lithium carbonate, is like throwing thousands of molecular monkey wrenches into the turning PtdIns cycles of each cell.